Question: For what body of government was Nizhny Novgorod the head starting on October 7, 2015?
Paraphrase: What government did Nizhny Novgorod head in 2015?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q891 p:P6 ?s . ?s ps:P6 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'2015')) }